If you essentially prefer the U.S. keyboard but you still need all the Czech characters with diacritical signs, you are recommended
Whenever possible, all the special characters are arranged just like on the U.S. keyboard.
However, all the special Czech characters that don't exist on the U.S. keyboard (+ěščřžýáíé úů) appear at the expected locations. AltGr restores English keys whenever they are superseded by Czech characters. For special accents, try the "equals" key (čárka, acute), "shift/equals" key (háček), and "backslash" key (umlautung). Try various combinations to learn the rest.
Czech keywords: Čechoamerická klávesnice pro systém Microsoft Windows.